Boring attachment



March 30, 19481 E. w. JACKSON BORING ATTACHMENT Filed 001;. 14, 1944 latented Mar. 30, 1948 UNITED s'm'n-zsv PATENT. omen 2,438,607 BORING-ATTACHMENT Ernest W. Jackson, Bellflower, Calif. Application October 14, 1944, Serial No. 558,675 Claims. (01. 279-6) This invention relates to boring attachments, or boring heads, for milling machines, and it has among its salient objects to provide certain improvement-s and simplifications in the construction and arrangement thereof as will make for economy efiiciency in operation; to provide in a boring head a plurality of tool holding bores, said bores being in a part of said head which is laterally adjustable with precision, for determining different operating posi tions of the tool; to provide in combination with the tool receiving bores, a transverse tool-receiving slot in which a tool can be placed and adjustably held, being adjustable lengthwise, but transversely of said boring head, thus giving greater capacity to head, as will be pointed out in the course of the detailed description thereof.

Other objects and advantages will appear from the following description of one practical embodiment of my invention, taken in connection with the accompanying sheet of drawings, in which:

Figure 1 is a plan view, looking endwise, of a, boring head embodying my invention;

Figure 2 is a side elevation thereof;

Figure 3 is a bottom plan view thereof;

Figure 4 is an enlarged, vertical sectional view through a boring head embodying my invention, taken on the line 4-4, Fig. l;

Figure 5 is a similar view taken on the line 5-5, Fig. 1;

Figure 6 is an enlarged cross sectional view taken on the line 6-8 of Fig. 2;

Figure 7 is a sectional view taken of Fig. 4; and

Figure 8 is a sectional view taken on line 8-8 of Fig. 5.

Referring now in detail to the drawings, 1'. will describe the boring head here shown for illustrative purposes. In the drawing, I have shown an arbor or spindle ID, with screw connection at II, with a body l2. The arbor is provided with a bore l3 and the body is provided with a bore M to receive tools for turning said parts together tightly.

The body I2 is formed part designated l5, has a middle extension l6, fitted into a corresponding recess l1, extending into and across the body l2, in a manner which will be understood from the sectional view in Fig. 5, and whereby the lower body part l5 and the extension it, through the upper body l2.

Two bores I8, l8, are put through the body l2 and the middle extension I8, on the opposite juncon line 'I-l in two parts, a lower will slide smoothly transversely ture lines, and two close fitting pins l8, l8, are inserted therein. These pins permit the parts to slide relative to each other, as before stated, and also prevent the parts from pulling apart.

The body l2, above the extension 16, is also provided with a bore l9, within which movably fits a hemi-sleeve member 20, as shown. This hemi-sleeve member and the top of the extension is are threaded to receive an adjustment screw 2|, having its head 22 provided with graduations on its outer face, as seen in Fig. 2, and also provided with a wrench socket 22' for turning it. Said screw bolt also is provided with an interlocking collar 23, spaced from its head, to intermesh with the upper body l2, as it fits down over said extension l6, said extension being cut away, as at 24, to give clearance therefor, while the front face of upper body l2 and the extension iii, are counter-sunk at 25 to receive the head 22, clearly seen in Fig. 4. This hemi-sleeve 20 functions in providing a firm and steady threaded bearing for the adjustment screw between it and the extension I6, and also facilitates assembling said parts.

The holding pins l8, l8, are seen in light broken lines in Fig. 4. These pins are also interlocked in place by means of a screw bolt 26, inserted from the right hand lower side of the body l2, as seen in Fig. 5, said screw bolt 26 cutting into the under sides of said pins in the manner indicated, to prevent them from moving endwise. Said interlocking screw bolt 26 rests in an elongated opening 21, in the body extension l6, and seen in the sectional view in Fig. 4, whereby the lower body l5 and its extension 16, can be moved laterally relative to the body l2, by means of the adjusting screw 2|, as it is turned in either di rection with suitable wrench or tool.

It will be understood, of course, that these adjustments, and the screw action is with precision fit, so that the adjustments are all accurately made.

The lower end of the body member I5, is provided with a central bore 28 to receive a boring tool, to be held in place by a set screw 29. There is also in said body member l5, another bore 39, to receive a boring tool, to be held in place by a set screw 3|. These bores 28 and 30 are deep enough, as will be clear from the sectional views in Figs. 4 and 5, to leave room for a transverse channel or slot 32, across the lower end of said head, or body. member l5, as shown, intersecting said bores 28 and 30 in the manner indicated. This makes provision for inserting a boring or cutting tool, lengthwise in said slot, to project operable for 3 such distance as may be required, said cutting tool being held in place by two set screws 33, 33, Fig. 7. This slot or groove, it will be noted, is parallel with the movement of the lower body member 55, and the extension l6, laterally relative to the upper member l2, thus making it possible to adjust said boring head I5 with micrometric accuracy and precision.

A boring'or cutting tool placed in bore centric with the tool proper can be adjusted laterally by moving the as the capacity of head body l5 laterally as far the screw 2!. The head part 7 i5 can then be returned and the tool transferred- .juncture faces and two smooth pins fitted into therewith, with precision means 'for adjusting the body part which holds the tools, in the manner'indicated and described. Iwdo not limit my invention to the details of construction-and arrangement here shown tor-explanatory -purposes, except as I mayhe -limited by the; hereto appended claims, e

.I claim: g j

l. A boring head including two body portions interfitted together :for lateral. movement :relative to each other, two bores into said bodysportions. at and intersecting the --jlmctures;ofetheir .interfitting portions, .twosmooth-pins fitted into said homes for locking r'sai-d body-portions against-separation whi'le rpermitting 'lateral adjustment of one .portion relative to the other, -anadjustment screw threaded between :saidbodyportions and moving one 1 portion relative to the other, an arbor on one body portion forlco-n-necting it with operating power, the other body po-rtion being providedin its end with tool-holding means.

p -2. A boring headincluding-two body parts slidably interfitted together and movable laterally relative to each other, one body part having means for connecting-it wit'hpower and the other body part having tool receiving and. holding means at its operating end, twobores. through said two'body parts at the'juncture lines: and two smooth pins fitted i-nto lsaid bores'to interlock said. parts together and-permitmelative: movement along said .pins, an. adjustment screw threaded into said 'body'parts, some juncture line therebetween, and parallel rwi thj .said pins, said screw being enerable iorlmoving one body part relative to the otherv alonglsaidtworpins.

3. A boring head including two; body parts slidably interfitt ed' together and movablelaterally relative to each other, one body .part having means for connecting it with. power and theother body part having tool-holding means-at its opera.

a-ting end, twolparalle lboresthrough said -.-b'o'dy parts at thejunctures, thereof .anditwo smooth two boreylto interlock said pins fitted into said I and permit sliding movement relative to each ,other, 'anr'adjustment scriew threaded into said body parts, at the junoltu're therebetween and parallel withsaidgiina'ja'hemisleeve.threadedjandfittedover said adjustment --g'ether with a rectangular recess in one part and. arectangular extension on the other part and forming parallel juncture faces between said .part's,':'two bores into said body parts on said said bores to interlock said body parts together and-permit sliding movement of one part relative to the other, one body part having means for .connectingitwith a power member and the its operating end,'an adjustment screw threaded into said bodyiparts lat. the juncture of the -faces at right anglesfto'saidparallel juncture faces, a hemi s'leeve threaded and fit adjustment screw in one'body part and resting at opposite sieeser saidscrew'upon the juncture face oftheother body part, and meansjinterlocking said twov smoothfpins in place. without .pr'eve'nting moi/em ent of said body parts relative to each other ,by. saidadjustment screw.

[5; In .a boring head of the character referred to, two body parts interfitted-together for sliding movement relative to'ieach other laterally, one body part having 'a rectangular, extension injits lniddlefan'd. across its diameter and the other part havingarectangular recess across juncture lines at opposite larrecess and extension and two smooth .pin's fitted therein 'to'ih'terlock said body parts together while permittin siiding movement laterally, an adjustment 'screwrtlireaded intojthe n the inner .end'of? said rectangular feXtensio'n land; said recess, parallel with said pins and operable to move one body p'artilaterallyrel'ative to theo-therfalong said pins, and means. interio'cking'sai d. pins in place, one of said body partshaving an arbor foriconnec'ti'ng it with power, and the other body'part having tool holding means at its operatingfiend, and graduations.,o .s aidia'd'justme'nt screw for determining adjustment movements .ftheredf; to moveone body part relativeto th'e ot-herbody .part. l I

juncture facesbetwee Y i l-ninete- Number Lllame V 892,894 Roman ,I L V V JUBKY, 190.8 1,153,673 .Bryant -l sens ng-1915 1,699,837, I ll lvere'ttlljne l; lariil2 2; 1929 1,713,039 I'lesoroni June.l8,j.1929 1,9e0,i24 Russel l May 22,1934 ii.-o'rrina;anennnnons' Q American 3, age 111.

other body part "having tcol holding means in I ted down oversaid v I its middle 1 to .receive said extension, two'boires through the sides 'ofrsaid rectangu- 

